Check for mismatch between two vectors : mismatch « STL Algorithms Non modifying sequence operations

Check for mismatch between two vectors : mismatch « STL Algorithms Non modifying sequence operations « C++ Tutorial

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C++ Tutorial » STL Algorithms Non modifying sequence operations » mismatch

25.12.2.Check for mismatch between two vectors

#include <iostream>

using std::cout;

using std::endl;



#include <algorithm>

#include <vector>

#include <iterator>



int main()

{

   int a1[ 10 ] = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };

   int a2[ 10 ] = { 1, 2, 3, 4, 9, 6, 7, 8, 9, 10 };

   std::vector< int > v1( a1, a1 + 10 );

   std::vector< int > v2( a1, a1 + 10 );

   std::vector< int > v3( a2, a2 + 10 );

   std::ostream_iterator< int > output( cout, " " );



   cout << "Vector v1 contains: ";

   std::copy( v1.begin(), v1.end(), output );

   cout << "\nVector v2 contains: ";

   std::copy( v2.begin(), v2.end(), output );

   cout << "\nVector v3 contains: ";

   std::copy( v3.begin(), v3.end(), output );



   std::pair< std::vector< int >::iterator, std::vector< int >::iterator > location;



   location = std::mismatch( v1.begin(), v1.end(), v3.begin() );

   cout << "\nThere is a mismatch between v1 and v3 at location "

      << ( location.first - v1.begin() ) << "\nwhere v1 contains "

      << *location.first << " and v3 contains " << *location.second;



   return 0;

}

Vector v1 contains: 1 2 3 4 5 6 7 8 9 10
Vector v2 contains: 1 2 3 4 5 6 7 8 9 10
Vector v3 contains: 1 2 3 4 9 6 7 8 9 10
There is a mismatch between v1 and v3 at location 4
where v1 contains 5 and v3 contains 9

25.12.mismatch
	25.12.1.	Generic mismatch algorithm: Find the corresponding positions in a deque and list at which unequal elements first occur
	25.12.2.	Check for mismatch between two vectors
	25.12.3.	Use mismatch function to find the first match
	25.12.4.	Use mismatch function with custom function
	25.12.5.	Demonstrates standard library functions equal, mismatch, lexicographical_compare.

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